Methods of Separation, Substances, Elements and Compounds

If you want to buy gold, what would be the first thing you ask the goldsmith? Won’t it be about the purity of the gold? But how would you know if a substance is pure or not? And if impure how do we obtain pure gold. That is Correct! By Purification. And which are the methods of purification employed to get pure compounds from impure ones? Click on the videos to know more!